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Finding the Fourth Proportional to 395.61, 545.38 and 271.07

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Solution

The fourth proportional to 395.61, 545.38 and 271.07 is: 373.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.61 : 545.38 = 271.07 : x
  2. Step 2: Convert to fraction form
    395.61/545.38 = 271.07/x
  3. Step 3: Cross multiply
    395.61x = 545.38 × 271.07
  4. Step 4: Simplify right side
    395.61x = 147,834.80
  5. Step 5: Solve for x
    x = 147,834.80/395.61
  6. Step 6: Final answer
    x = 373.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.